Originally Posted by
Maelochs
This is a large part of it. If Huffy (or whichever mega-corporation owns them) bought 100,000 unbadged Tourney rear derailleurs, but decided to produce 150,000 bikes which need a rear derailleur, they might buy no-name, or whatever .... whatever was cheapest at the time. Maybe branded Tourney, maybe unbranded Tourney, maybe the last-generation model or the new one .... Same with any other parts. They'd have to list six or 11 build sheets per bike.
And complicating things, is the ease and frequency with which the manufacturers can swap model names amongst various different bikes. That Huffy might be sold all over the world in several different names, and vice-versa. This year's Huffy might have been some other brand last year. The KevCentral Youtube channel has a lot of good comments about bikes within this price range and I think he must be buying about 50 bikes a year just to review.